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BS 970 (Part 1) 655H13 vs JIS G4102 SNC815

Close Alternative — 84% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 655H13 (BS 970 (Part 1):1991) and JIS G4102 SNC815 (JIS G 4102:1979) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 655H13 is typically used for case hardening steel (section four), while JIS G4102 SNC815 is commonly used for heavily stressed gears, differential components. BS 970 (Part 1) 655H13 is defined under British Standards (BS), originating from United Kingdom, while JIS G4102 SNC815 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 1) 655H13 vs JIS G4102 SNC815 is a 84% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 84%.

Frequently Compared With BS 970 (Part 1) 655H13:
GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 11169 (Part 1) 12Ni3Cr2 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
84%
MECHANICAL MATCH
No shared data
OVERALL
84%
Specifications
Property BS 970 (Part 1) 655H13 JIS G4102 SNC815
Standard BS 970 (Part 1):1991 JIS G 4102:1979
Category Alloy Steel Alloy Steel
C (%) 0.10-0.16 0.12–0.18
Mn (%) 0.35-0.60 0.30–0.60
Cr (%) 0.70-1.00 0.60–1.00
Ni (%) 3.00-3.75 3.00–3.50
Si (%) Not specified 0.15–0.35
P (%) Not specified ≤0.030
S (%) Not specified ≤0.030
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 655H13 JIS G4102 SNC815
Tensile Strength Not specified ≥980 MPa
Case Hardness HRC Not specified 60–65
Typical Applications
BS 970 (Part 1) 655H13
Case hardening steel (section four)
JIS G4102 SNC815
Heavily stressed gears, differential components
Key Differences
Can BS 970 (Part 1) 655H13 Be Substituted With JIS G4102 SNC815?
BS 970 (Part 1) 655H13 and JIS G4102 SNC815 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 655H13
No active listings currently.
JIS G4102 SNC815
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4900–5900 mm (192.91–232.28 in)
On M-EX Right Now
BS 970 (Part 1) 655H13
0 active listings and RFQs →
JIS G4102 SNC815
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 655H13 and JIS G4102 SNC815?
JIS G4102 SNC815 specifies Si, P, S which are not specified for BS 970 (Part 1) 655H13.
Can BS 970 (Part 1) 655H13 be substituted with JIS G4102 SNC815?
BS 970 (Part 1) 655H13 and JIS G4102 SNC815 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.